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Marathon Sonian Forest
TrailBelgiumBrussels-Capital

Marathon Sonian Forest2027

28.02.2027Oudergem (Belgium)Dates to be confirmed
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Pacing, fueling and crew sheet for the course you pick

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4 courses · 12–42 km · up to 679 m D+

4 courses

  1. 12km

    187 m D+

    avg 2%

    SONIAN FOREST

    28.02.

    No index

  2. 21km

    353 m D+

    avg 2%

    SONIAN FOREST

    28.02.

    UTMB Index 20K

  3. 30km

    549 m D+

    avg 2%

    SONIAN FOREST

    28.02.

    UTMB Index 20K

  4. 42km

    679 m D+

    avg 2%

    SONIAN FOREST

    28.02.

    UTMB Index 20K

External route

12 km187 m D+

External content: map and profile provided by the third-party service.

Race plan

Plan your race from start to finish.

Pacing, aid stations and fueling timed to your effort on Marathon Sonian Forest, in one roadbook.

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The race

The routes run largely through the forest and form one loop. The terrain consists of more than 90% of unpaved paths. Departure from the sports center through the Sonian Forest.

Where to stay

Find a place to stay near Oudergem for the race.

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